Transceiving circuit for contactless communication
AssigneeNXP B.V.
InventorErich Merlin
Life of this patent
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Abstract
A transceiving circuit (1, 1′, 1″) for contactless communication comprises transmitter means (3) being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to transmitting data, and an antenna (5) having an inductor (Lant), which antenna (5) is connected to and driven by the transmitter means (3) with the modulated carrier signal. AC coupling capacitors (C4) are coupled to the inductor (Lant) of the antenna (5), wherein the AC coupling capacitors (C4) are further connected to inputs of switches (S1, S2). The outputs of these switches (C4) can be switched between ground potential and inputs of rectifier means (6). The outputs of the rectifying means (6) are fed to power supply rails (PbF1, PbF2) of the transceiving circuit (1).
Claims11
A transceiving circuit for contactless communication comprising:
- a transmitter being adapted to generate an electromagnetic carrier signal and to modulate the carrier signal according to transmitting data, an antenna having an inductor, which antenna is connected to and driven by the transmitter with the modulated carrier signal, and
- wherein AC coupling capacitors are coupled to the inductor of the antenna, wherein the AC coupling capacitors are further connected to inputs of switches the outputs of these switches being switchable between ground potential and inputs of rectifier mean's, the outputs of the rectifying means being fed to power supply rails of the transceiving circuit.
Dependencies are inferred from the claim text.